Fiberglass Windows: A Sustainable Choice in Non-Residential and Multi-Family Buildings
Architects have another option for window systems in commercial and institutional building designs.
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Sponsored by Pella Corporation
- Block frame with pocket installation (window replacement). (See Figure 21.) This is an excellent and very economical choice for applications where the existing frames are in good condition and only the sash needs to be replaced. The new window sash are factory assembled into a fiberglass frame that essentially creates a full window unit that is custom made to slide easily into the existing frame or "pocket". Because it is a full unit, it can be tested for compliance with applicable ASTM and other standards. The result is a high quality window with a faster installation that eliminates the cost and complexity of a complete tear-out.
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Figure 21: Block frame with pocket installation for window replacement Images courtesy of Pella Corporation |
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- Block frame with standard subframe (window replacement). (See Figure 22.) This installation system is typically used when wood windows are being replaced with fiberglass windows. The existing wood sash is removed and the subframe is used to conceal the existing wood window frame while providing a receptor for the new fiberglass window. It allows windows to be installed from the interior of the building, thus reducing labor costs and eliminating the need for exterior scaffolding or lifts.
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Figure 22: Block frame with standard subframe installation details Images courtesy of Pella Corporation |
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Originally published in December 2010
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